Ovonic NiMH 900mAh 3.6 V 3s battery is a battery pack specifically designed for baby monitors. It is made of nickel-metal hydride compounds. It is cheaper than lipo batteries and has higher safety performance.

It is forbidden to send nickel-metal hydride batteries to landfills in some areas, so please separate and recycle used batteries

When using nickel-metal hydride batteries for the first few times, you may find that they deplete (discharge) quickly during use. Don't worry, this is normal. They need to be fully charged before they are used for the first time.